FVB-FN Series bag type dust collector is developed jointly by
Design & Research Institute for Environmental Protection of
Building Materials under China Silicate Society and our company by
adopting up-to-date technology from Japan and USA . So, it is a bag
type dust collector with excellent performance and high efficiency.
This type of dust collector has integrated advantages of other
types of dust collectors such as sectional reverse blowing and
internal filtering and adopted up-to-date technology and process of
reverse suction de-ashing, motorized 3-way valve etc. to increase
the de-ashing efficiency, to extend the lifetime of bag, to
overcome the disadvantage of de-ashing and filtering
simultaneously. It has also the features of simple operation and
maintenance, and safe, stable and reliable operation.
This product has been widely used, as the dust collection system,
in the fields of power industry, iron and steel industry,
metallurgical industry, chemical industry, kiln furnace mill in
cement industry. For example, it can be used for the dust
collection of pulverizing system with O-sepa selector, which allows
a dust density of up to 1000g /Nm 3 in the air for the primary dust
collection with out cyclone dust collector. It can also be applied
to the dust collection for coal pulverizing system, dryer, vertical
kiln if it has been equipped with explosion protected and
temperature insulation equipment, or applied to dust treatment in
the professions of glass, ceramic. Customers' selections are
welcome and we will provide you with excellent service.
Ⅰ . Equipment Structure
1. Main components of dust collectorenclosure, bag assembly,
exhaust pipes, reverse blowing pipe, air intake pipe, manhole door,
dust discharge device, support bracket, various kinds of valves
2. Control section of dust collectoradvanced digital PLC control
technology adoptedmain components from ABB ）.
3. Main fan blower matched with the equipment: dust conveying
device, air intake and exhaust pipes.
Ⅱ . Operational Principle
1. FilteringAir or gas contained dust will enter into the chamber
under the function of main fan blower and some rough dust will drop
into the bottom of dust hopper due to inertia and collision. The
dust-contained gas is distributed into each chamber evenly by guide
device and it then becomes clean air after being filtered through
the surface of filtering bags and is exhausted by main fan through
the exhaust pipes on the top of chamber.
This dust collector is operated under negative pressure and the
dust contents in the air after purification shall be less than
50mg/Nm 3 which is better than the requirements of national
2. De-ashing and electrical controlAfter the operation of dust
collector, the dust layer gathered at internal surfaces of bags is
increased. When its resistance has reached a certain value (or
after certain time operation), the control system will switch the
direction of electrical valve; natural air or circulating air will
be sucked into the filtering chamber due to the negative pressure;
the filtering bag becomes flat and vibration occurs to do de-ashing
to make dust separated and dropped into ash hopper which is then
exhausted by screw conveyer and dumping device.
The whole de-ashing process is carried out chamber by chamber and
is controlled by PLC and it can also be carried out by 3 kinds of
controlling methods: pressure difference, timing and manual mode.
The 3-way changeover valve, pneumatic components, cooling air
valve, dumping valve are used to realize a programmable control for
the system and as for the sensors they are interlocked controlled
such as temperature or level alarm, cooling system, by-pass system
and switch on /off.
In this way, the de-ashing efficiency is insured and at the same
time the lifetime of bag is extended and so does the operational
Ⅲ . Kinds of Filtering Materials Follows are the materials for customer's selection ）
Filtering MaterialTemperature Resistance
1Normal temperature needling felt120
2High temperature needling felt compound200
3High temperature-resistant glass compound260
4Glass fiber cloth260
5Glass fiber bulk yarn cloth280
Ⅳ . Main Current Products Available
Dust Collector of Long bag, Low Pressure, Pulse and Off-line Type
Dust Collector of Long Bag, Low Pressure, Pulse and On-line Type
Dust Collector of Low Pressure, Cloth Drum, Pulse Type
Dust Collector of High Pressure, Cloth Drum, Pulse Type
Dust Collector of Air Chamber, Pulse and Bag Type
Filtering BagNormal or High Temperature
Bag CageRound or Star Typeetc.
Ⅴ . Explanations to Type Selection: